WO2017150459A1 - Outil de coupe - Google Patents

Outil de coupe Download PDF

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Publication number
WO2017150459A1
WO2017150459A1 PCT/JP2017/007522 JP2017007522W WO2017150459A1 WO 2017150459 A1 WO2017150459 A1 WO 2017150459A1 JP 2017007522 W JP2017007522 W JP 2017007522W WO 2017150459 A1 WO2017150459 A1 WO 2017150459A1
Authority
WO
WIPO (PCT)
Prior art keywords
axis
holder
head
hole
angle
Prior art date
Application number
PCT/JP2017/007522
Other languages
English (en)
Japanese (ja)
Inventor
良克 森
弘樹 松原
竜勢 濱田
神代　政章
一彦 鹿島
康宏 梶原
Original Assignee
住友電工ハードメタル株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 住友電工ハードメタル株式会社 filed Critical 住友電工ハードメタル株式会社
Priority to CN201780014948.4A priority Critical patent/CN108698139B/zh
Priority to US16/082,029 priority patent/US10766077B2/en
Priority to JP2018503300A priority patent/JP6790335B2/ja
Priority to EP17759925.5A priority patent/EP3424630A4/fr
Publication of WO2017150459A1 publication Critical patent/WO2017150459A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B31/00—Chucks; Expansion mandrels; Adaptations thereof for remote control
    • B23B31/02—Chucks
    • B23B31/10—Chucks characterised by the retaining or gripping devices or their immediate operating means
    • B23B31/107—Retention by laterally-acting detents, e.g. pins, screws, wedges; Retention by loose elements, e.g. balls
    • B23B31/1075—Retention by screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/02—Twist drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/02—Connections between shanks and removable cutting heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2270/00—Details of turning, boring or drilling machines, processes or tools not otherwise provided for
    • B23B2270/58—Oblique elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/06—Drills with lubricating or cooling equipment

Definitions

  • the present invention relates to a cutting tool.
  • This application claims the priority based on Japanese Patent Application No. 2016-042308, which is a Japanese patent application filed on March 4, 2016. All the descriptions described in the Japanese patent application are incorporated herein by reference.
  • Patent Document 1 discloses a drill in which an insert can be attached to and detached from a main body.
  • An insertion hole is provided in the main body of the drill, and a clamp screw is disposed in the insertion hole. By tightening the clamp screw, the clamp screw comes into contact with the shank portion of the insert, and the insert is fixed to the main body portion.
  • a drill holder described in Japanese Patent Application Laid-Open No. 2005-144655 is formed with a shank hole for inserting an insert and a bolt hole communicating with the shank hole.
  • the bolt hole extends in a direction inclined with respect to the extending direction of the shank hole.
  • the fastening bolt is disposed in the halt hole, and the insert is fixed to the holder by the fastening bolt abutting on the inclined groove of the insert.
  • JP 2011-5632 A discloses a rotary tool having a base having a center hole, a loose top having a pin, and a radial screw. A loose top pin is inserted into the center hole. The loose top is locked in the axial direction by the radial screw.
  • Patent Document 4 discloses a drill having a cutting tip having a shaft foot, a holder having a bearing hole and a through hole, and a fixing member.
  • the shaft foot portion of the cutting tip is inserted into the bearing hole of the holder.
  • the fixing member is inserted into the through hole and is in contact with the shaft foot.
  • the cutting tool includes a holder, a head, and a fastening portion.
  • the holder has a first surface and a second surface that are spaced from each other so as to sandwich the axis.
  • the head includes a cutting edge portion located between the first surface and the second surface and a shank portion that holds the cutting edge portion.
  • the fastening portion fixes the head to the holder.
  • the holder extends in a first direction inclined by a first angle from a direction perpendicular to the axis toward the cutting edge, and is directed from the second surface to the first surface when viewed from a direction parallel to the axis.
  • a first hole extending in a third direction inclined by a second angle from the second direction and a second hole communicating with the first hole and extending in a direction parallel to the axis are provided.
  • the shank part has a flat part and is provided inside the second hole.
  • the fastening portion is provided inside the first hole and is in contact with the flat portion.
  • the third angle between the fourth direction and the second direction perpendicular to the plane portion is larger than the second angle.
  • the third angle is less than 90 °.
  • FIG. 1 is a schematic perspective view illustrating a configuration of a cutting tool according to Embodiment 1.
  • FIG. FIG. 2 is an exploded perspective schematic view showing the configuration of the cutting tool according to the first embodiment.
  • FIG. 3 is a schematic perspective view illustrating the configuration of the holder of the cutting tool according to the first embodiment.
  • FIG. 4 is an enlarged view of region IV in FIG.
  • FIG. 5 is a schematic left side view illustrating the configuration of the holder of the cutting tool according to the first embodiment.
  • FIG. 6 is a schematic plan view illustrating the configuration of the holder of the cutting tool according to the first embodiment.
  • FIG. 7 is a schematic front view illustrating the configuration of the holder of the cutting tool according to the first embodiment.
  • FIG. 8 is a schematic cross-sectional view seen from the direction perpendicular to the axis showing the configuration of the holder of the cutting tool according to the first embodiment.
  • FIG. 9 is a schematic perspective view illustrating the configuration of the head of the cutting tool according to the first embodiment.
  • FIG. 10 is a schematic front view illustrating the configuration of the head of the cutting tool according to the first embodiment.
  • FIG. 11 is a schematic left side view illustrating the configuration of the head of the cutting tool according to the first embodiment.
  • FIG. 12 is a schematic left side view showing the positional relationship between the head and the holder before clamping.
  • FIG. 13 is a schematic cross-sectional view seen from the direction parallel to the axis showing the positional relationship between the head, the holder, and the fastening portion before clamping.
  • FIG. 14 is a schematic left side view showing the positional relationship between the head and the holder after clamping.
  • FIG. 15 is a schematic cross-sectional view seen from the direction parallel to the axis showing the positional relationship between the head, the holder, and the fastening portion after clamping.
  • FIG. 16 is a schematic left side view illustrating the configuration of the cutting tool according to the second embodiment.
  • FIG. 17 is a schematic perspective view illustrating the configuration of the head of the cutting tool according to the third embodiment.
  • FIG. 18 is a schematic cross-sectional view seen from a direction parallel to the axis showing the configuration of the cutting tool according to the third embodiment.
  • FIG. 19 is a schematic cross-sectional view seen from the direction perpendicular to the axis showing the configuration of the holder of the cutting tool according to the third embodiment.
  • FIG. 20 is a schematic left side view illustrating the configuration of the holder of the cutting tool according to the third embodiment.
  • FIG. 21 is a schematic left side view illustrating the configuration of the cutting tool according to the third embodiment.
  • FIG. 22 is a schematic cross-sectional view seen from the direction perpendicular to the axis showing the configuration of the holder of the cutting tool according to the fourth embodiment.
  • FIG. 23 is a schematic left side view illustrating the configuration of the head of the cutting tool according to the fourth embodiment.
  • FIG. 24 is a schematic cross-sectional view for explaining the evaluation method of the example.
  • FIG. 25 is a diagram showing the relationship between the distance between the front end surface of the holder and the bottom surface of the blade edge portion of the head and the inclination angle of the flat surface portion of the head.
  • the head is fixed to the holder so that the center of the drill head is aligned with the center of the holder. Further, the drill requires a mechanism for receiving the cutting force applied in the rotation direction between the side surface of the head and the wall portion of the body, and for bringing the head into close contact with the holder.
  • Patent Document 1 In the drill described in Japanese Patent Application Laid-Open No. 2007-245295 (Patent Document 1), when the clamp screw is tightened, the head tries to obtain a force in the rotational direction and the retracting direction. Since the clamp screw contacts the head only at one point, a sufficient clamping force cannot be obtained and the head cannot be firmly fixed to the holder.
  • Patent Document 2 in order to make it easy to remove the head, there is a gap between the hole portion of the holder that fits the shaft portion of the head and the shaft portion. Exists. Therefore, since the head can move, the head cannot be fixed to the holder with high accuracy. As a result, the head may move during processing and sufficient performance may not be obtained.
  • One aspect of the present invention is made to solve the problems related to clamping of a head such as a drill, and an object thereof is to provide a cutting tool that can firmly and accurately fix the head to a holder. It is. [Effects of the present disclosure] According to one embodiment of the present invention, it is possible to provide a cutting tool that can be firmly and highly accurately fixed to a holder.
  • the cutting tool 100 includes a holder 10, a head 20, and a fastening portion 30.
  • the holder 10 has a first surface 11 and a second surface 12 that are spaced from each other so as to sandwich the axis DA.
  • the head 20 includes a cutting edge portion 51 positioned between the first surface 11 and the second surface 12 and a shank portion 52 that holds the cutting edge portion 51.
  • the fastening part 30 fixes the head 20 to the holder 10.
  • the holder 10 has a second surface extending from a direction perpendicular to the axis DA to the first direction D1 inclined by the first angle ⁇ 1 toward the cutting edge 51 and viewed from a direction parallel to the axis DA.
  • An extending second hole H2 is provided.
  • the shank part 52 has the plane part 21 and is provided inside the second hole H2.
  • the fastening portion 30 is provided inside the first hole H ⁇ b> 1 and is in contact with the flat portion 21.
  • the third angle ⁇ 3 between the fourth direction D4 and the second direction D2 perpendicular to the plane portion 21 is larger than the second angle ⁇ 2.
  • the third angle ⁇ 3 is less than 90 °.
  • the present inventors obtained the following knowledge and found one aspect of the present invention. Specifically, a measure for suppressing the movement of the head 20 in the rotation direction while drawing the shank portion 52 of the head 20 into the second hole H2 of the holder 10 was examined.
  • the holder 10 was provided with a first hole H1 extending in a first direction D1 inclined by a first angle ⁇ 1 from the direction perpendicular to the axis DA toward the cutting edge 51.
  • the fastening part 30 is provided inside the first hole H1 and is in contact with the flat part 21 of the shank part 52 of the head 20.
  • the shank portion 52 When the fastening portion 30 pushes the flat surface portion 21 of the shank portion 52, the shank portion 52 can be drawn into the second hole H2 of the holder 10.
  • the extending direction of the first hole H1 is a third direction D3 inclined by a second angle ⁇ 2 from the second direction D2 from the first surface 11 toward the second surface 12 when viewed from the direction parallel to the axis DA,
  • the third angle ⁇ 3 between the fourth direction D4 and the second direction D2 perpendicular to the plane portion 21 is set larger than the second angle ⁇ 2.
  • the one end surface 23 of the head 20 can be pressed against the first surface 11 of the holder 10 and the other end surface 24 of the head 20 can be pressed against the second surface 12 of the holder 10. Thereby, the head 20 can be firmly fixed to the holder 10 with high accuracy.
  • the first angle ⁇ 1 may be 13 ° or more. Thereby, the shank part 52 of the head 20 can be effectively pulled into the second hole H ⁇ b> 2 of the holder 10.
  • the second angle ⁇ 2 may be not less than 10 ° and not more than 45 °.
  • the value obtained by subtracting the second angle ⁇ 2 from the third angle ⁇ 3 may be 5 ° or less.
  • the blade edge portion 51 includes the third surface 23 facing the first surface 11 and the fourth surface 24 facing the second surface 12. And may be included.
  • the shortest distance L3 between the first surface 11 and the axis DA is longer than the shortest distance L4 between the second surface 12 and the axis DA, and between the third surface 23 and the axis DA.
  • the shortest distance L1 may be longer than the shortest distance L2 from the fourth surface 24 to the axis DA.
  • the third surface 23 of the head 20 faces the first surface 11 of the holder 10, and the head 20 It is possible to fix the head 20 to the holder 10 so that the fourth surface 24 faces the second surface 12 of the holder 10. On the contrary, the third surface 23 of the head 20 corresponds to the second surface of the holder 10. It is also possible to fix the head 20 to the holder 10 so as to face the surface 12 and the fourth surface 24 of the head 20 faces the first surface 11 of the holder 10.
  • the flat surface portion 21 of the head 20 becomes the fastening portion 30. Does not touch In particular, the head 20 may be attached to the holder 10 in a situation where visual observation is difficult.
  • the holder 10 and the head 20 as in the present embodiment, it is possible to prevent the head 20 from being attached to the holder 10 in the wrong direction.
  • the shank portion 52 is positioned between the contact portion 72 on the opposite side of the flat portion 21 and between the flat portion 21 and the contact portion 72.
  • An anti-adhesion groove 47 may be provided. If the gap between the shank portion 52 and the second hole H2 is small, the shank portion 52 may not come out of the second hole H2 once the shank portion 52 is inserted into the second hole H2. By providing the anti-adhesion groove 47 in the shank portion 52, it is possible to prevent the shank portion 52 from being removed from the second hole H2.
  • the holder 10 may be provided with a coolant supply path H3.
  • the opening 65 of the coolant supply path H3 may be exposed from the groove 48 provided in the blade edge 51. Chips are usually discharged outside through the flute. Therefore, for example, when the opening part of the coolant supply path H3 is formed in the flute part, the coolant discharged from the opening part is obstructed by the chips and effectively cools the contact part between the blade edge part and the work material. I can't.
  • the coolant can be supplied in front of the blade edge portion 51. Therefore, the contact portion between the cutting edge portion and the work material can be effectively cooled.
  • the holder 10 may be provided with a coolant supply path H3.
  • the opening 65 of the coolant supply path H3 may be exposed in the through hole 53 provided in the cutting edge 51. Thereby, the coolant can be supplied in front of the blade edge portion 51. Therefore, the contact portion between the cutting edge portion and the work material can be effectively cooled.
  • the cutting tool 100 is, for example, a blade-tip replaceable drill, and mainly includes a holder 10, a head 20, and a fastening portion 30. .
  • the holder 10 is provided with a first hole H1 and a second hole H2.
  • the second hole H2 extends along a direction parallel to the axis DA.
  • the first hole H1 extends in a direction inclined with respect to a direction perpendicular to the axis DA.
  • the first hole H1 communicates with the second hole H2.
  • the head 20 includes a blade edge portion 51 and a shank portion 52 that holds the blade edge portion 51.
  • the shank portion 52 of the head 20 is disposed inside the second hole H2.
  • the holder 10 has a first surface 11 and a second surface 12 that are spaced from each other so as to sandwich the axis DA.
  • the blade edge portion 51 of the head 20 is located between the first surface 11 and the second surface 12.
  • the fastening part 30 is arrange
  • the fastening part 30 fixes the head 20 to the holder 10.
  • a male screw portion is formed on the outer peripheral surface of the fastening portion 30.
  • a female screw portion that can be screwed with the male screw portion is formed.
  • the fastening part 30 is a clamp screw, for example.
  • the fastening portion 30 is moved in the direction of the second hole H2 inside the first hole H1 by rotating the fastening portion 30 in a tightening direction by a driver.
  • the head 20 is fixed to the holder 10 by pressing the bottom surface of the fastening portion 30 against the flat surface portion 21 provided on the shank portion 52 of the head 20.
  • the front end 44 of the head 20 is positioned forward of the first front end surface 13 of the holder 10 in a direction parallel to the axis DA.
  • the axis DA is the rotation axis of the cutting tool when cutting the work material.
  • the cutting tool 100 is not limited to a drill as long as it is a rotary cutting tool capable of cutting a work material while rotating around the axis DA.
  • the cutting tool 100 may be, for example, an edge-exchangeable end mill.
  • the holder 10 includes a first surface 11, a second surface 12, a first tip surface 13, a second tip surface 14, a first inclined surface 61, and a second surface.
  • the first side surface 19 is continuous with both the first flute surface 17 and the second flute surface 16. In other words, the first side surface 19 is located between the first flute surface 17 and the second flute surface 16 and connects the first flute surface 17 and the second flute surface 16.
  • the second side surface 18 is continuous with both the first flute surface 17 and the second flute surface 16.
  • the second side surface 18 is located between the first flute surface 17 and the second flute surface 16 and connects the first flute surface 17 and the second flute surface 16.
  • the first tip surface 13 and the second tip surface 14 are located on one side of the holder 10, and the rear end surface 64 is located on the other side of the holder 10.
  • the holding part 60 is a part fitted to the main shaft of the machine tool.
  • the first tip surface 13 is continuous with the first surface 11.
  • the first inclined surface 61 is continuous with both the first tip surface 13 and the first surface 11.
  • the first inclined surface 61 is inclined with respect to both the first tip surface 13 and the first surface 11.
  • the first inclined surface 61 is continuous with the first flute surface 17.
  • the second tip surface 14 is continuous with the second surface 12.
  • the second inclined surface 62 is continuous with both the second tip surface 14 and the second surface 12.
  • the second inclined surface 62 is inclined with respect to both the second tip surface 14 and the second surface 12.
  • the second inclined surface 62 is continuous with the second flute surface 16.
  • the first tip surface 13 is substantially parallel to the second tip surface 14.
  • the first tip surface 13 and the second tip surface 14 are flat surfaces that are substantially perpendicular to the axis DA.
  • the first tip surface 13 is a surface that is substantially perpendicular to the first surface 11.
  • the second tip surface 14 is a surface substantially perpendicular to the second surface 12.
  • the second side surface 18 is located on the opposite side of the first side surface 19 as viewed from the axis DA.
  • the first flute surface 17 extends spirally around the axis DA.
  • the second flute surface 16 extends spirally around the axis DA while being separated from the first flute surface 17.
  • the first side surface 19 and the second side surface 18 are curved surfaces that are convex outward when viewed from the axis DA.
  • the first flute surface 17 and the second flute surface 16 are inwardly convex curved surfaces when viewed from the axis DA.
  • the first side surface 19 is continuous with the first inclined surface 61.
  • the second side surface 18 continues to the first inclined surface 61.
  • the first side face 19 of the holder 10 is provided with a first hole H1.
  • the first hole H1 extends in a first direction D1 that is inclined by a first angle ⁇ 1 in a direction from the direction DR perpendicular to the axis DA toward the cutting edge 51 (see FIG. 1). is doing.
  • the first direction D1 is inclined by the first angle ⁇ 1 toward the first tip surface 13 from the direction DR perpendicular to the axis DA.
  • the first angle ⁇ 1 is, for example, 13 ° or more, and preferably 15 ° or more.
  • the first angle ⁇ 1 may be 20 ° or less, for example.
  • the first angle ⁇ 1 may be not less than 12 ° and not more than 18 °.
  • the first direction D1 is also inclined with respect to the axis DA.
  • a recess 70 may be provided in the first side surface 19, and a first hole H ⁇ b> 1 may be provided in the bottom of the recess 70.
  • the first hole H1 has a third direction inclined by a second angle ⁇ 2 from the second direction D2 from the second surface 12 toward the first surface 11 when viewed from the direction parallel to the axis DA. It extends to D3.
  • the third direction D3 is inclined from the second direction D2 toward the first tip surface 13 by the second angle ⁇ 2.
  • the second angle ⁇ 2 is not less than 10 ° and not more than 45 °.
  • the second angle ⁇ 2 may be 20 ° or more.
  • the second angle ⁇ 2 may be 30 ° or less, or 40 ° or less.
  • the head 20 includes a blade edge portion 51 and a shank portion 52 that holds the blade edge portion 51.
  • the blade edge 51 of the head 20 includes a third surface 23, a fourth surface 24, a first tip surface 25, a second tip surface 26, and a third tip surface 27.
  • a ridge line between the first rake face 43 and the third tip face 27 constitutes a first cutting edge 27a.
  • the ridge line between the second rake face 46 and the second tip face 26 constitutes a second cutting edge 27b.
  • the shank portion 52 of the head 20 mainly has a flat surface portion 21, a curved surface portion 22, and a rear end portion 45.
  • the shank portion 52 is in contact with the blade edge portion 51 at the seating surface 49.
  • the cross-sectional shape of the shank part 52 in the seating surface 49 is, for example, a circle.
  • the shank portion 52 extends in the direction of the axis DA of the head 20.
  • the axis DA is the rotation axis of the head 20. As shown in FIG. 10, when viewed from a direction parallel to the plane portion 21 and perpendicular to the axis DA, the plane portion 21 is inclined by an angle ⁇ with respect to the axis DA. Yes.
  • the angle ⁇ is substantially the same as the first angle ⁇ 1.
  • the angle ⁇ is, for example, 13 ° or more, and preferably 15 ° or more.
  • the angle ⁇ may be 20 ° or less, for example.
  • the angle ⁇ may be not less than 12 ° and not more than 18 °.
  • the flat surface portion 21 faces the first hole H ⁇ b> 1 provided in the holder 10 when the head 20 is attached to the holder 10.
  • the third surface 23 and the fourth surface 24 are separated from each other with the axis DA interposed therebetween.
  • the third surface 23 and the fourth surface 24 face each other.
  • the third surface 23 is substantially parallel to the fourth surface 24.
  • the third surface 23 is continuous with the first tip surface 25, the fifth tip surface 41, and the first rake surface 43.
  • the fourth surface 24 continues to the fourth tip surface 28, the sixth tip surface 42, and the second rake surface 46.
  • the second tip surface 26 is separated from both the third surface 23 and the fourth surface 24.
  • the third tip surface 27 is separated from both the third surface 23 and the fourth surface 24.
  • the first tip surface 25 extends in a direction intersecting both the third surface 23 and the fifth tip surface 41.
  • the fourth tip surface 28 extends in a direction intersecting both the fourth surface 24 and the sixth tip surface 42.
  • the shank portion 52 of the head 20 is inserted into the second hole H ⁇ b> 2 of the holder 10.
  • the seating surface 49 of the head 20 is in contact with the bottom surface 15 of the holder 10.
  • the third surface 23 of the head 20 faces the first surface 11 of the holder 10.
  • the fourth surface 24 of the head faces the second surface 12 of the holder 10.
  • the blade edge 51 of the head 20 is disposed in a space sandwiched between the first surface 11 and the second surface 12.
  • the third direction D3 is a direction in which the first hole H1 extends.
  • the fourth direction D4 is a direction perpendicular to the planar portion 21 of the head 20.
  • the third angle ⁇ 3 between the fourth direction D4 and the second direction D2 perpendicular to the plane portion 21 is the second direction D2 and the second direction D2. It is larger than the second angle ⁇ 2 between the three directions D3.
  • the third angle ⁇ 3 is less than 90 °.
  • the third angle ⁇ 3 is, for example, not less than 10 ° and not more than 30 °.
  • a value obtained by subtracting the second angle ⁇ 2 from the third angle ⁇ 3 is, for example, 5 ° or less, and preferably 1 ° or less.
  • the fastening part 30 mainly has a main body part 33, a tip part 32, and a contact surface 31.
  • the diameter of the main body 33 is substantially the same as the diameter of the first hole H1.
  • the main body 33 is formed with, for example, a male screw.
  • the main body 33 is in contact with the side surface constituting the first hole H1.
  • the tip portion 32 has a smaller diameter than the main body portion 33.
  • the distal end portion 32 may be separated from the side surface constituting the first hole H1.
  • the contact surface 31 is in contact with the flat portion 21 of the head 20.
  • the fastening portion 30 is provided inside the first hole H1. A part of the tip portion 32 of the fastening portion 30 may be located inside the second hole H2.
  • the fastening part 30 moves in a direction approaching the shank part 52 of the head 20, the contact surface 31 of the fastening part 30 contacts a part of the flat part 21 of the head 20.
  • a rotational force acts on the head 20.
  • the head 20 rotates in the rotation direction R1 around the axis DA.
  • the head 20 rotates in the rotation direction R ⁇ b> 1, the third surface 23 of the head 20 is pressed against the first surface 11 of the holder 10. Similarly, the fourth surface 24 of the head 20 is pressed against the second surface 12 of the holder 10. As a result, the head 20 is pulled into the second hole H2 from the first tip surface 13 and the second tip surface 14 of the holder 10 toward the rear end surface 64, and the head 20 is moved to the first surface 11 and the first surface of the holder 10. It is fixed to the two surfaces 12 and the bottom surface 15. In this state, the work material is cut.
  • the rotation method of the head 20 at the time of cutting is a direction opposite to the rotation direction R1.
  • the fourth angle ⁇ 4 between D5 and the second direction D2 is smaller than the third angle ⁇ 3 (see FIG. 12).
  • the first surface 11 may be inclined with respect to the third surface 23.
  • the second surface 12 may be inclined with respect to the fourth surface 24.
  • part of the contact surface 31 may be separated from the flat surface portion 21 after the fastening by the fastening portion 30 is completed.
  • 50% or more of the area of the contact surface 31 may be in contact with the flat portion 21, 90% or more of the area of the contact surface 31 may be in contact with the flat portion 21, or may be in complete contact. May be.
  • the holder 10 has the first extending in the first direction D1 inclined by the first angle ⁇ 1 from the direction perpendicular to the axis DA toward the cutting edge 51.
  • a hole H1 is provided.
  • the fastening portion 30 is provided inside the first hole H1 and is in contact with the flat portion 21 of the shank portion 52 of the head 20. When the fastening portion 30 pushes the flat surface portion 21 of the shank portion 52, the shank portion 52 can be drawn into the second hole H2 of the holder 10.
  • the extending direction of the first hole H1 is a third direction D3 that is inclined by a second angle ⁇ 2 from the second direction D2 from the first surface 11 toward the second surface 12 when viewed from a direction parallel to the axis DA.
  • the third angle ⁇ 3 between the fourth direction D4 and the second direction D2 perpendicular to the plane portion 21 is larger than the second angle ⁇ 2.
  • the head 20 when the head 20 is aligned with the center of the holder 10 and the head 20 is fixed to the holder 10 by the fastening portion 30, the head 20 is pulled toward the holder 10 while the head 20 is rotated by a small amount. Using the bottom surface 31 of the head 30, the head 20 can be fixed to the holder 10 firmly and with high accuracy.
  • the first angle ⁇ 1 is 13 ° or more.
  • the shank part 52 of the head 20 can be effectively pulled into the second hole H ⁇ b> 2 of the holder 10.
  • the second angle ⁇ 2 is not less than 10 ° and not more than 45 °.
  • the value obtained by subtracting the second angle ⁇ 2 from the third angle ⁇ 3 is 5 ° or less.
  • the configuration of the cutting tool 100 according to the second embodiment is the same as the configuration of the first embodiment in that the shortest distance from the axis DA to the first surface 11 is longer than the shortest distance from the axis DA to the second surface 12.
  • the other configurations are substantially the same as those of the first embodiment. For this reason, the following description will focus on differences from the configuration of the first embodiment.
  • the distance L1 from the axis DA to the third surface 23 is the fourth from the axis DA. It is longer than the distance L2 to the surface 24.
  • the shortest distance L3 between the first surface 11 and the axis DA is the shortest distance L4 between the second surface 12 and the axis DA. May be longer.
  • the shortest distance L3 between the first surface 11 and the axis DA is longer than the shortest distance L4 between the second surface 12 and the axis DA, and the third surface 23 and the axis DA. May be longer than the shortest distance L2 from the fourth surface 24 to the axis DA.
  • the shortest distance L1 is, for example, 2.18 mm.
  • the shortest distance L2 is 1.68 mm, for example.
  • a value obtained by subtracting the shortest distance L2 from the shortest distance L1 is 1.0 mm or less.
  • a value obtained by subtracting the shortest distance L4 from the shortest distance L3 is 1.0 mm or less.
  • the first hole H1 is provided in the first side surface 19.
  • a straight line perpendicular to both the second direction D2 and the axis DA direction is defined as a straight line B1.
  • the straight line B1 is parallel to both the first surface 11 and the second surface 12, for example.
  • the straight line B1 is parallel to both the third surface 23 and the fourth surface 24, for example.
  • the distance between the axis DA and the second side surface 18 in the plane perpendicular to the axis DA is the radius R of the holder 10.
  • a straight line connecting the contact C2 between the circle C1 and the third surface 23 and the axis DA is defined as a straight line B2.
  • a straight line connecting the contact C3 between the circle C1 and the first surface 11 and the axis DA is defined as a straight line B3.
  • the contact point C3 may be a contact point between the first surface 11 and the first side surface 19.
  • the shortest distance L1 is the same as the shortest distance between the contact C2 and the straight line B1.
  • the shortest distance L3 is the same as the shortest distance between the contact C3 and the straight line B1.
  • An angle ⁇ 11 between the straight line B1 and the straight line B2 in a plane perpendicular to the axis DA is expressed by the following formula 1.
  • An angle ⁇ 12 between the straight line B1 and the straight line B3 in a plane perpendicular to the axis DA is expressed by the following formula 2.
  • the angle ⁇ 13 is expressed by Equation 3 below.
  • a straight line connecting the contact C4 between the circle C1 and the fourth surface 24 and the axis DA is defined as a straight line B4.
  • a straight line connecting the contact C5 between the circle C1 and the second surface 12 and the axis DA is defined as a straight line B5.
  • the shortest distance L2 is the same as the shortest distance between the contact C4 and the straight line B1.
  • the shortest distance L4 is the same as the shortest distance between the contact C5 and the straight line B1.
  • An angle ⁇ 14 between the straight line B1 and the straight line B4 in a plane perpendicular to the axis DA is expressed by the following mathematical formula 4.
  • An angle ⁇ 15 between the straight line B1 and the straight line B5 in a plane perpendicular to the axis DA is expressed by the following formula 5.
  • the angle ⁇ 16 is expressed by Equation 6 below.
  • the absolute value of the difference between the angle ⁇ 13 and the angle ⁇ 16 is preferably small.
  • the absolute value of the difference between the angle ⁇ 13 and the angle ⁇ 16 is preferably 30 seconds or less. One second is 1/3600 °.
  • the angle ⁇ 13 may be smaller than or equal to a value obtained by subtracting the angle ⁇ 2 from the angle ⁇ 3 (see FIG. 12).
  • the angle ⁇ 16 may be smaller than or equal to a value obtained by subtracting the angle ⁇ 2 from the angle ⁇ 3 (see FIG. 12).
  • the blade edge portion 51 includes the third surface 23 that faces the first surface 11 and the fourth surface 24 that faces the second surface 12.
  • the shortest distance L3 between the first surface 11 and the axis DA is longer than the shortest distance L4 between the second surface 12 and the axis DA, and between the third surface 23 and the axis DA.
  • the shortest distance L1 is longer than the shortest distance L2 from the fourth surface 24 to the axis DA.
  • the third surface 23 of the head 20 faces the first surface 11 of the holder 10, and the head 20 It is possible to fix the head 20 to the holder 10 so that the fourth surface 24 faces the second surface 12 of the holder 10. On the contrary, the third surface 23 of the head 20 corresponds to the second surface of the holder 10. It is also possible to fix the head 20 to the holder 10 so as to face the surface 12 and the fourth surface 24 of the head 20 faces the first surface 11 of the holder 10.
  • the 1st hole H1 is formed only in the 1st surface 11 side of the holder 10, if the head 20 is attached reversely, the plane part 21 of the head 20 will not contact
  • the head 20 may be attached to the holder 10 in a situation where visual observation is difficult.
  • the thickness of the portion of the holder 10 on the first surface 11 side where the first hole H1 is formed is smaller than the thickness of the portion of the holder 10 on the second surface 12 side where the first hole H1 is not formed. Therefore, the rigidity of the portion of the holder 10 on the first surface 11 side where the first hole H1 is formed can be maintained high.
  • the configuration of the cutting tool 100 according to Embodiment 3 is the same as that of the first embodiment in that the coolant passage groove 48 is provided in the cutting edge portion of the head 20 and the anti-adhesion groove 47 is provided in the shank portion of the head 20.
  • the configuration is different, and the other configurations are almost the same as those of the first embodiment. For this reason, the following description will focus on differences from the configuration of the first embodiment.
  • the shank portion 52 of the head 20 includes a contact portion 72, an adhesion preventing groove 47, and a curved surface portion 71.
  • the contact part 72 is on the side opposite to the flat part 21.
  • the anti-adhesion groove 47 is located between the flat surface portion 21 and the contact portion 72.
  • the anti-adhesion groove 47 may be a notch provided in the shank portion 52.
  • the adhesion preventing groove 47 is, for example, a plane.
  • the anti-adhesion groove 47 may extend in a direction parallel to the axis DA.
  • the normal line of the anti-adhesion groove 47 may be substantially perpendicular to the axis DA.
  • the anti-adhesion groove 47 may be cut through the rear end portion 45.
  • the contact part 72 is a curved surface, for example.
  • the curved surface portion 71 connects the flat surface portion 21 and the adhesion preventing groove 47.
  • the coolant passage groove 48 may be provided on the third surface 23 of the blade edge portion 51. As shown in FIGS. 17 and 21, the coolant passage groove 48 extends from the seat surface 49 to the first tip surface 25. The coolant passage groove 48 may be cut through the seat surface 49, the first tip surface 25, and the fifth tip surface 41. The longitudinal direction of the coolant passage groove 48 may be a direction parallel to the axis DA. As shown in FIG. 21, the coolant passage groove 48 may also be provided on the fourth surface 24. The coolant passage groove 48 may cut through the fourth tip surface 28 and the sixth tip surface 42.
  • the contact part 72 of the shank part 52 contacts the surface of the holder 10 that constitutes the second hole H2.
  • the sticking prevention groove 47 is separated from the surface H2a of the holder 10 constituting the second hole H2.
  • the coolant may pass through the gap between the anti-adhesion groove 47 and the surface H2a.
  • the curved surface portion 71 may be separated from the surface of the holder 10 constituting the second hole H2.
  • the holder 10 may be provided with a coolant supply path H3.
  • the coolant supply path H ⁇ b> 3 extends along the axis DA of the holder 10.
  • One end of the coolant supply path H ⁇ b> 3 may open to the rear end face 64 of the holder 10.
  • the other end of the coolant supply path H3 may communicate with the second hole H2. That is, the second hole H2 is configured to function as a coolant supply path.
  • the area of the opening 65 of the second hole H2 that is a part of the coolant supply path is the second hole communicating with the first hole H1. It may be larger than the area of the portion H2.
  • the opening 65 is formed in the bottom surface 15.
  • the opening 65 may have a straight line portion parallel to the first surface 11 and a straight line portion parallel to the second surface 12.
  • the opening 65 of the coolant supply path H3 is formed in the head 20 when viewed from the direction parallel to the axis DA. It is exposed from the coolant passage groove 48 provided. In other words, most of the opening 65 overlaps the head 20 as viewed from the direction parallel to the axis DA, but a part of the opening 65 does not overlap the head 20. Therefore, the coolant flows from the coolant supply path H3 to the second hole H2, passes through the gap between the adhesion preventing groove 47 and the surface H2a, and reaches the opening 65 of the second hole H2. Next, the coolant is ejected from the opening 65 exposed from the head 20 to the front of the head 20 through the coolant passage groove 48.
  • the shank part 52 has the contact part 72 on the opposite side to the flat part 21 and the adhesion preventing groove 47 located between the flat part 21 and the contact part 72. ing. If the gap between the shank portion 52 and the second hole H2 is small, the shank portion 52 may not come out of the second hole H2 once the shank portion 52 is inserted into the second hole H2. By providing the anti-adhesion groove 47 in the shank portion 52, it is possible to prevent the shank portion 52 from being removed from the second hole H2.
  • the holder 10 may be provided with the coolant supply path H3.
  • the opening 65 of the coolant supply path H3 may be exposed from the groove 48 provided in the blade edge 51. Chips are usually discharged outside through the flute. Therefore, for example, when the opening part of the coolant supply path H3 is formed in the flute part, the coolant discharged from the opening part is obstructed by the chips and effectively cools the contact part between the blade edge part and the work material. I can't.
  • the coolant can be supplied in front of the blade edge portion 51. Therefore, the contact portion between the cutting edge portion and the work material can be effectively cooled.
  • Embodiment 4 Next, the configuration of the cutting tool 100 according to Embodiment 4 will be described.
  • the configuration of the cutting tool 100 according to the fourth embodiment is different from the configuration of the third embodiment in that a through hole 53 is provided instead of the coolant passage groove 48 and the coolant supply path H3 is branched.
  • Other configurations are almost the same as those of the third embodiment. Therefore, the following description will focus on the differences from the configuration of the third embodiment.
  • the coolant supply path H3 is provided in the holder 10 according to Embodiment 4, and the coolant supply path H3 may be branched.
  • the coolant supply path H3 branches, for example, into a first coolant supply path H3a and a second coolant supply path H3c.
  • the first coolant supply path H3a may communicate with the third coolant supply path H3b.
  • the second coolant supply path H3c may communicate with the fourth coolant supply path H3d.
  • the first coolant supply path H3a may extend in a direction that intersects both the coolant supply path H3 and the third coolant supply path H3b.
  • the second coolant supply path H3c may extend in a direction that intersects both the coolant supply path H3 and the fourth coolant supply path H3d.
  • the opening H3e of the third coolant supply path H3b may be exposed on the bottom surface 15 of the holder 10.
  • the opening H3f of the fourth coolant supply path H3d may be exposed on the bottom surface 15 of
  • a through hole 53 may be provided in the head 20 according to the fourth embodiment.
  • the through hole 53 may be provided in the first tip surface 25 and the fourth tip surface 28, for example.
  • the openings H3e and H3f of the coolant supply path H3 may be exposed in the through hole 53.
  • the through hole 53 communicates with the openings H3e and H3f.
  • the holder 10 may be provided with the coolant supply path H3.
  • the opening 65 of the coolant supply path H3 may be exposed in the through hole 53 provided in the cutting edge 51.
  • the coolant can be supplied in front of the blade edge portion 51. Therefore, the contact portion between the cutting edge portion and the work material can be effectively cooled.
  • each holder 10 is provided with a first hole H1 that is inclined in the direction of the end face 15 from a straight line perpendicular to the axis.
  • the first direction D1 in which the first hole H1 extends was the same as the normal direction of the flat portion 21 of the head 20.
  • the inclination angle ⁇ of the plane portion 21 with respect to the axis was set to 0 °, 5 °, 10 °, 15 °, and 20 °.
  • the inclination angle ⁇ is the same as the first angle ⁇ 1 (see FIG. 8) between the first direction D1 in which the first hole H1 extends and the direction DR perpendicular to the axis DA.
  • a part of the shank portion 52 of the head 20 is placed in the second hole H2 of the holder 10 so that the distance in the axial direction between the end surface 15 of the holder 10 and the seating surface 49 of the cutting edge portion 51 of the head 20 is 1 mm. (See the state before clamping in FIG. 24). Before clamping, the distance A1 in FIG. 24 is 1 mm.
  • a clamp screw 30 as a fastening portion was inserted into the first hole H1 of the holder 10.
  • the shank portion 52 of the head 20 was drawn into the second hole H2 by clamping the clamp screw 30 with, for example, a screw driver. The lower surface of the clamp screw 30 was in contact with the flat portion 21 of the shank portion. After the clamping of the clamp screw 30 was completed, the distance A2 between the end surface 15 of the holder 10 and the seating surface 49 of the blade edge portion 51 of the head 20 was measured (see the state before clamping in FIG. 24).
  • FIG. 25 shows the relationship between the distance A2 and the inclination angle ⁇ of the plane portion 21 of the head 20.
  • the distance A2 is 1 mm.
  • the distance A2 is 0 mm.
  • the distance A2 decreases. That is, the shank portion 52 of the head 20 is easily pulled into the second hole H ⁇ b> 2 of the holder 10 as the inclination angle ⁇ of the flat portion 21 of the head 20 increases.
  • the inclination angle ⁇ is 15 ° or more.
  • the distance A2 is 0 mm, and the seating surface 49 of the blade edge portion 51 of the head 20 comes into contact with the end surface 15 of the holder 10.
  • the inclination angle ⁇ is desirably 15 ° or more.
  • the inclination angle ⁇ is desirably 15 ° or more and 20 ° or less. From the above experiment, it was confirmed that the first angle ⁇ 1 (see FIG. 8) is preferably 15 ° or more and 20 ° or less.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)

Abstract

Outil de coupe doté d'un porte-outil, d'une tête et d'un élément de fixation. Le porte-outil présente une première surface (11) et une deuxième surface (12). La tête comprend une partie (51) de pointe à lames et une partie (52) de tige. Le porte-outil comporte un premier trou (H1) s'étendant dans une troisième direction, qui est inclinée d'un deuxième angle par rapport à une deuxième direction orientée de la deuxième surface (12) vers la première surface (11) dans une vue depuis la direction parallèle à la ligne axiale, et un deuxième trou (H2) en communication avec le premier trou (H1). La partie de tige présente une partie plate (21) et est placée à l'intérieur du deuxième trou (H2). L'élément (30) de fixation est placé dans le premier trou (H1) et est en contact avec la partie plate (21). Un troisième angle entre la deuxième direction et une quatrième direction perpendiculaire à la partie plate (21) est supérieur au deuxième angle dans un plan perpendiculaire à la ligne axiale. Le troisième angle est inférieur à 90°.
PCT/JP2017/007522 2016-03-04 2017-02-27 Outil de coupe WO2017150459A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201780014948.4A CN108698139B (zh) 2016-03-04 2017-02-27 切削工具
US16/082,029 US10766077B2 (en) 2016-03-04 2017-02-27 Cutting tool
JP2018503300A JP6790335B2 (ja) 2016-03-04 2017-02-27 切削工具
EP17759925.5A EP3424630A4 (fr) 2016-03-04 2017-02-27 Outil de coupe

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JP2016042308 2016-03-04
JP2016-042308 2016-03-04

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WO2017150459A1 true WO2017150459A1 (fr) 2017-09-08

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EP (1) EP3424630A4 (fr)
JP (1) JP6790335B2 (fr)
CN (1) CN108698139B (fr)
WO (1) WO2017150459A1 (fr)

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JP2021501698A (ja) * 2017-11-02 2021-01-21 イスカル リミテッド 切削ヘッド、および切削ヘッドが合わせピンによってシャンクに解放可能に締め付けられる回転切削工具
WO2022130856A1 (fr) * 2020-12-16 2022-06-23 住友電工ハードメタル株式会社 Tête de forage et foret

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CN116616858A (zh) * 2014-08-06 2023-08-22 史赛克公司 电动手术手持件、卡持器和切割附件
KR102432947B1 (ko) * 2020-10-20 2022-08-18 한국야금 주식회사 인덱서블 드릴
US11813679B2 (en) * 2021-02-10 2023-11-14 Taegutec Ltd. Insert holder and cutting tool assembly including the same
JP1715992S (ja) * 2021-08-17 2022-05-27 切削工具
JP1715996S (ja) * 2021-08-27 2022-05-27 ドリルホルダ

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Publication number Priority date Publication date Assignee Title
JP2021501698A (ja) * 2017-11-02 2021-01-21 イスカル リミテッド 切削ヘッド、および切削ヘッドが合わせピンによってシャンクに解放可能に締め付けられる回転切削工具
JP7203841B2 (ja) 2017-11-02 2023-01-13 イスカル リミテッド 切削ヘッド、および切削ヘッドが合わせピンによってシャンクに解放可能に締め付けられる回転切削工具
WO2022130856A1 (fr) * 2020-12-16 2022-06-23 住友電工ハードメタル株式会社 Tête de forage et foret
JP7148038B1 (ja) * 2020-12-16 2022-10-05 住友電工ハードメタル株式会社 ドリルヘッド及びドリル
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US10766077B2 (en) 2020-09-08
JP6790335B2 (ja) 2020-11-25
EP3424630A4 (fr) 2019-10-30
CN108698139A (zh) 2018-10-23
CN108698139B (zh) 2021-02-23
JPWO2017150459A1 (ja) 2018-12-27
EP3424630A1 (fr) 2019-01-09
US20190232388A1 (en) 2019-08-01

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